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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
//===-- llvm-diff.cpp - Module comparator command-line driver ---*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the command-line driver for the difference engine.
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//
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//===----------------------------------------------------------------------===//
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#include "DiffLog.h"
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#include "DifferenceEngine.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string>
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#include <utility>
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using namespace llvm;
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/// Reads a module from a file. On error, messages are written to stderr
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/// and null is returned.
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static std::unique_ptr<Module> readModule(LLVMContext &Context,
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StringRef Name) {
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SMDiagnostic Diag;
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std::unique_ptr<Module> M = parseIRFile(Name, Diag, Context);
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if (!M)
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Diag.print("llvm-diff", errs());
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return M;
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}
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static void diffGlobal(DifferenceEngine &Engine, Module &L, Module &R,
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StringRef Name) {
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// Drop leading sigils from the global name.
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if (Name.startswith("@")) Name = Name.substr(1);
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Function *LFn = L.getFunction(Name);
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Function *RFn = R.getFunction(Name);
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if (LFn && RFn)
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Engine.diff(LFn, RFn);
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else if (!LFn && !RFn)
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errs() << "No function named @" << Name << " in either module\n";
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else if (!LFn)
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errs() << "No function named @" << Name << " in left module\n";
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else
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errs() << "No function named @" << Name << " in right module\n";
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}
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static cl::opt<std::string> LeftFilename(cl::Positional,
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cl::desc("<first file>"),
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cl::Required);
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static cl::opt<std::string> RightFilename(cl::Positional,
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cl::desc("<second file>"),
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cl::Required);
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static cl::list<std::string> GlobalsToCompare(cl::Positional,
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cl::desc("<globals to compare>"));
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int main(int argc, char **argv) {
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cl::ParseCommandLineOptions(argc, argv);
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LLVMContext Context;
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// Load both modules. Die if that fails.
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std::unique_ptr<Module> LModule = readModule(Context, LeftFilename);
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std::unique_ptr<Module> RModule = readModule(Context, RightFilename);
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if (!LModule || !RModule) return 1;
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DiffConsumer Consumer;
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DifferenceEngine Engine(Consumer);
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// If any global names were given, just diff those.
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if (!GlobalsToCompare.empty()) {
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for (unsigned I = 0, E = GlobalsToCompare.size(); I != E; ++I)
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diffGlobal(Engine, *LModule, *RModule, GlobalsToCompare[I]);
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// Otherwise, diff everything in the module.
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} else {
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Engine.diff(LModule.get(), RModule.get());
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}
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return Consumer.hadDifferences();
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}
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